字符拼接的几种方式

 char dest[100]={"hellow"};

char src[100]={ word!}; 

char file_name[200];

sprintf(file_name, "%s/%s",dest , src);//将src连接到dest后面、并放入file_name中

  char str[80];

    strcpy (str,"these ");//将these复制到str中

    strcat (str,"strings ");//将strings拼接到there后面

    strcat (str,"are ");

    strcat (str,"concatenated.");